99226181 has 2 divisors, whose sum is σ = 99226182. Its totient is φ = 99226180.

The previous prime is 99226111. The next prime is 99226201. The reversal of 99226181 is 18162299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98208100 + 1018081 = 9910^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 99226181 - 2¹⁴ = 99209797 is a prime.

It is a super-2 number, since 2×99226181² = 19691669991689522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99226111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49613090 + 49613091.

It is an arithmetic number, because the mean of its divisors is an integer number (49613091).

Almost surely, 2^99226181 is an apocalyptic number.

It is an amenable number.

99226181 is a deficient number, since it is larger than the sum of its proper divisors (1).

99226181 is an equidigital number, since it uses as much as digits as its factorization.

99226181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 99226181 is about 9961.2339095114. The cubic root of 99226181 is about 462.9585319574.

The spelling of 99226181 in words is "ninety-nine million, two hundred twenty-six thousand, one hundred eighty-one".